title: In vitro maturation and fertilization of prepubertal and pubertal black Bengal goat oocytes.
abstract: Oocytes retrieval, in vitro maturation (IVM) and fertilization (IVF) efficiency are inevitable steps towards in vitro production of embryos. In the present study, these parameters were investigated in the ovaries of prepubertal (n = 31) and pubertal (n = 61) black Bengal goats obtained from a slaughterhouse. Nuclear maturation was evaluated upon aspiration and following IVM in TCM-199 (Earle's salt with L-glutamine and sodium bicarbonate) for 27 h at 39°C under 5% CO(2) in humidified air. The oocytes retrieval and efficiency (mean ± SD) per prepubertal and pubertal goats were 5.2 ± 0.6 and 6.8 ± 0.6, and 77.3 ± 0.1% and 80.5 ± 0.6%, respectively. Anaphase I - telophase I stages differed significantly (7.3 ± 0.8 vs. 2.6 ± 0.2, p < 0.05) between the two groups of goats. After IVM, the percentages of metaphase II were significantly higher (66.3 vs. 60.3, p < 0.05) in pubertal goats than in their prepubertal counterparts. The percentages of normal in vitro fertilization (IVF) in Fert-Tyrode's albumin lactate pyruvate of pubertal goat oocytes did not differ between Percoll and swim-up sperm separation methods (36.7 ± 0.9% vs. 32.7 ± 1.3%, p > 0.05). Furthermore, sperm capacitation by heparin alone or in combination with ionomycin did not lead to a significant increase in the normal fertilization rate (34.8 ± 1.7 vs. 32.2 ± 1.5%, respectively) in the oocytes of pubertal goats. In conclusion, the ovaries of pubertal black Bengal goats obtained from the slaughterhouse could be used for in vitro embryo production. However, further optimization of the IVM and IVF techniques are necessary for satisfactory in vitro embryo production.
authors.affiliation: Department of Surgery and Obstetrics, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh.
authors.forename: Momena
authors.initials: M
authors.lastname: Khatun
authors.forename: Mohammad Musharraf Uddin
authors.initials: MM
authors.lastname: Bhuiyan
authors.forename: Jalal Uddin
authors.initials: JU
authors.lastname: Ahmed
authors.forename: Aminul
authors.initials: A
authors.lastname: Haque
authors.forename: Mohammad Bozlur
authors.initials: MB
authors.lastname: Rahman
authors.forename: Mohammed
authors.initials: M
authors.lastname: Shamsuddin
mesh_terms: D000818:Animals; D046508:Culture Techniques; D047108:Embryonic Development / Q000502:physiology*; D005260:Female; D005307:Fertilization in Vitro / Q000662:veterinary*; D006041:Goats / Q000196:embryology*; D008297:Male; D054315:Oocyte Retrieval / Q000662:veterinary; D009865:Oocytes / Q000502:physiology*; D010053:Ovary / Q000166:cytology; D012741:Sexual Maturation; D013075:Sperm Capacitation; D020858:Tissue and Organ Harvesting / Q000662:veterinary